Truck axle-box mounting for railway rolling stock



Aug- 10, 1954 J. wALDvoGEI.

TRUCK AXLE BOX MOUNTING FOR RAILWAY ROLLING STOCK Filed March l5, 1950 Il h1 joys.

Patented Aug. 10, 1954 TRUCK AXLE-BOX MOUNTING FOR RAILWAY ROLLING STOCK Jakob Waldvogel, Winterthur, Switzerland, assgnor to Schweizerische Lokomotivund Maschinenfabrik, Winterthur, Switzerland Application March 15, 1950, Serial No. 149,713

Claims priority, application Switzerland March 21, 1949 (Cl. 10S-223) 4 Claims.

or stirrup and a beam. The said hanger is sup-v ported in a transversely rockable relation on the top of the axle box, whilst the said beam is articulated to the lower ends of the two hanger legs and is loaded from the truck frame through resilient elements.

In another transversely movable mounting known in the art, which also comprises two main parts, the stirrup is not put over the top of the axle box, but is disposed inside the latter and is directly supported on the axle bearing in a transversely movable relation. 'Ihe transversely movable axle box which surrounds the stirrup, either abuts against the top of' the latter in a transversely oscillatable relation or is articulated to the depending lateral stirrup legs in a transversely rockable relation similar to the firstmentioned mounting. 'I'he axle box thus assumes the function of a beam on which the vehicle or truck frame is spring-supported.

The said known transversely movable mountings require more space on the top of the axle bearing than rigid axle bearings. This proves a disadvantage in cases Where it is desired to dispose the vehicle frame directly above the axlebox centers and to make the frame as shallow as possible such as by using H-beams or box girders.

A further disadvantage of the said known mounting is that the point of engagement or bearing of the rockable support cannot be arranged at the level of the axle-box center, but must be disposed above the same. Such arrangement gives origin to a tilting moment on the axle bearing when the mounting swings laterally, and thus causes undesirable one-sided additional stresses on the bearing portion.

The said disadvantages are avoided by my present invention in that the hanger or stirrup comprises a beam portion disposed below the axle box, and two rockable supporting portions integral with the said beam portion, the said supporting portions being disposed on both sides of the axle box and articulated thereto in a transversely movable relation. The mounting according to my present invention on the one hand affords a simple design of the oscillatable stirrup and, on the other hand, does not encroach on 2, the space above the axle box, with the result that the truck frame portions to be disposed at this locality may be depressed and their lateral dimensions are not restricted.

The two rockable supporting portions suitably are articulated to the axle box at the level of the car axle, so as to give rise to transverse forces only, but not to tilting moments, when the mounting swings out laterally.

Three forms of my invention are illustrated in the accompanying drawing, in which- Fig. 1 shows an elevation of the first example, i. e. a side View in the left-hand portion and a vertical section in the right-hand portion,

Fig. 2 shows a cross-section on the line II-II of Fig. l,

Fig. 3 shows a horizontal section on the broken line III- III of Fig. 1,

Fig. 4 shows the second example in a perspective view,

Fig. 5 a vertical section of the second example transversely of the springs, and

Fig. 6 is a vertical section on the line VI-VI of Fig. 1. v

In the first example (Figs. 1, 2, 3 and 6), the

yaxle bearing comprises a self-aligning roller bearing I and an axle box 2 with a cover 3 and sealing ring 4. The inner bearing ring is secured to the car axle 5 by means of a nut 6. A vertical guide stud 8 is fixed to the vehicle frame l on both sides of the axle box 2. A spring pocket 9 receiving the supporting spring I0 is guided on each said stud. The two spring pockets 9 are interconnected by means of a spacing bar I6. The frame or truck load is transmitted from the spring pockets 9 on to the axle box 2 through two similar, parallel swing hangers or stirrups I I. Each of the latter comprises a bridge portion I Ia and two prop-portions I Ib. The bridge portions Ha pass below the axle box and at their ends support the spring pockets 9 on knife-edge bearings I3, whilst the props IIb disposed on either side of the axle box, are suspended by means of knife edges I4 on saddle pieces 2i carried by a pin I5 traversing the box structure 2. The props are thus pivotally connected to the axle box and may efect a pendular movement in transverse direction. On swinging or rocking laterally, tbe oscillatable props E Ib, the spring pockets 9 and the axle-bearing I--4 together form a parallelogram wherein the hangers II assume the position I I shown in Fig. 2 by dash-and-dot lines. The axle box thus is correctly guided, but does not perform any oscillatory movements proper. If desired from any reason, the two hangers Il could be slightly inclined relative to each other, instead of being mounted parallel as shown.

It will be appreciated from Figs. 1-3 and 6 that the space intermediate the axle 'bearing and vehicle or truck frame is not encroached upon by parts of the hangers Il, so that the designer may provide the cross-sectional dimension and arrangement of the vehicle or truckirame .unhampered by such limitation or space. -All the knife-edge bearings of the oscillatable props are readily accessible and, therefore, may be easily inspected and attended to. Since the props Hb are articulated to the axle box 2 at the level of the car axle, only transverse :forces but no tilting moments are set up in the axle bearing when the mounting swings out laterally.

In the second example, shown in Figs. 4 and 5, the two laterally disposed helical springs l0 of the rst example are replaced by a single leaf spring packet il. The rockably swing hangers vor'stirrups il here again comprise a beam yportion I-la and two vertically disposed and laterally l oscillatable props lib each. The center part .of

the beam portion -ila below the axle box 2 is adapted to accommodate the leaf springs l'l on two-knife-edges I9 provided on the bridge portion lfl'a `of the hangers Il. The oscillatable props -l lb, however, which are disposed at both sides of the axle bearing are articulated to the axle Ebox substantially at the level of the axle and in a transversely movable relation, as in the iirst example. The axle bearing may be in form of =a self-aligning roller bearing or of a plain journal'bearing or of two roller bearings.

In all of the three examples shown and described, special slippers or sliding shoes 20 lprovided with guideways `22 may be arranged on both sides of the axle box for the purpose of transmitting the traction and braking forces acting longitudinally of the vehicle. Transmitting elements ofother types such asguiding links, however, could be provided for.

What I claim `as new and desire to secure by Letters Patent, is:

1. In a truck suspension for rail vehicles, the

combination with a vehicle frame andan axle having a journal and a journal box at each end thereof adjustable about an axis extending longintudinally with respect to the vehicle frame, a

vertically movable guide body, means carried by the vehicle frame yfor vertically guiding said body. rand two hangers associated with each journal box at the ends of said axle and situated 4in transverse planes with respect to the truck axle, -each of said two hangers having a bridge portion positioned below the journal box and two arms extending upwardly from the bridge portion and `1laterally of the journal box, said arms being `pivotally connected to the journal box at either yside thereof and said bridge portion being pivot- `ally connected to said guide body at a level situated below the pivotal connection of said arms so as to permit transverse oscillatory movements of the hangers, whereby the axis of the axle box is maintained at right angles to the vertical axis of the guide body when said hangers are transversely swung out of itheir vertical position.

2. A truck suspension for rail vehicles as de- -vfined in claim 1, wherein those arms of said two hangers whichare situated at the same side of the journal'box are mounted on a common bolt so as to be transversely oscillatable, said bolt `being lparallel to .the axle and situated substantially at the level of the axis thereof.

3. A truck suspension for rail vehicles as claimed vin claim l wherein said guide body is formed as a spring saddle of a leaf spring assem- V`blysituatedbelow the journal box and on which the vehicle frame bears, said two hangers extending at either side of the leaf spring assembly and having their bridge portions pivotally bearing by their central portion against said spring saddle.

4. In a truck suspension for rail vehicles, the combination with a1vehicle frame and an axle having a journal and a journal box at each Aend thereof adjustable about an axis extending longitudinally with Vrespect to the 4vehicle frame, a vertically movable guide 'body formed with two guidesleeves guided each along a vertical vguide stud on the vehicle frame, and two hangers associated with each journal box at the ends of said axle and situated in transverse planes with respect to the truck axle, each of said two hangers having a bridge portion positioned below the journal box, said bridge portionshaving end portions extending beyond the vbase of the arms and pivotally supporting said two guide sleeves, said two hangers further comprising two arms extending upwardly from said bridge portion and laterally of ,the journal box and being pivotally connected to the journal box at either side thereof, the pivotal connection of said bridge end .portions being situated at a level below .the pivotal connection of said arms with said journal box so as to .permit transverse oscillatory movements of the hangers, 'whereby .the axis of the axle box is maintained at right angles ,to the vertical axis of 'the guide body when said hangers are transversely swung out of their vertical position.

References Cited in the le of this vpatent UNITED STATES PATENTS Number Name Date 2,267,210 Mussey Dec. 23, 1941 301,705 Kirsten et al. Nov. 10, 1942 2,473,732 Shilling June 2l, 1949 FOREIGN PATE-NTS Number Country Date 23,244 AGreat Britain -|Oct. 28, l1915 of 1914 

